Study of Martensitic Transformation in a CuZnAl Shape Memory Alloy using Photoemission

Conference · Fri Oct 28 04:00:00 EDT 2005

OSTI ID:982978

Cai, Mingdong; Langford, Stephen C.; Dickinson, Thomas; Huang, W. M.; He, Q.; Droubay, Timothy C.; Baer, Donald R.

The thermally-induced martensitic transformation in a polycrystalline CuZnAl shape memory alloy (SMA) was probed using photostimulated electron emission (PSE) and ultra-violet photoelectron spectroscopy (UPS). UPS measurements of the apparent surface work function during heating show distinct differences that we attribute to electronic structure changes associated with the transformation. In situ photoelectron emission intensities during heating also show distinctive changes that can be accounted for on the basis of the change in work function. In-situ photoemission measurements can provide quantitative, spatially resolved information on surface fraction of austenite and martensite phases as the transformation proceeds.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 982978
• Report Number(s): PNNL-SA-45741; 11102; KP1704020
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AUSTENITE
COPPER ALLOYS
ELECTRONIC STRUCTURE
Environmental Molecular Sciences Laboratory
HEATING
MARTENSITE
PHASE TRANSFORMATIONS
SHAPE MEMORY EFFECT
WORK FUNCTIONS
ZINC ALLOYS